JP6308429B2 - Non-contact power supply device detection method and non-contact power supply device - Google Patents

Description

  The present invention relates to a device detection method for a non-contact power supply apparatus and a non-contact power supply apparatus.

  2. Description of the Related Art Conventionally, in a non-contact power feeding device, a plurality of primary coils are arranged in a plane, and a primary coil of a power receiving device provided in the electrical device by exciting the opposing primary coil regardless of the position of the electrical device. There has been proposed a non-contact power feeding device with a free layout that can feed power.

  Further, in Patent Document 1, a plurality of position detection coils for detecting which primary coil among the plurality of primary coils is arranged in a staggered manner so as not to overlap the primary coil. Install. Then, the plurality of position detection coils are energized in a predetermined fixed order and for a predetermined time, respectively, and it is determined whether or not an electric device is arranged based on the voltage between the terminals of the energized position detection coil at that time. When it is determined that an electric device is disposed, a non-contact power feeding device has been proposed in which efficient power feeding is performed by energizing the primary coil adjacent to the position detection coil for power feeding. .

  Similarly, in Patent Document 2, detection of a mouse is performed from time to time for a fixed time and a predetermined time for each primary coil. And the non-contact electric power feeder which electrically energized for electric power feeding with respect to the primary coil by which the mouse | mouth was detected, and was made to perform efficient electric power feeding is proposed.

WO2008-32746 JP 2009-271446 A

  By the way, in the above-described free layout non-contact power feeding device, the electrical device can receive power regardless of the position within the power feeding area. Therefore, even if the electric device is moved to another position in the power supply area, the electric device can receive power.

  However, in the said patent document 1 and patent document 2, the detection of an electric equipment is performed respectively repeating the fixed order predetermined for each primary coil, and the fixed time. Therefore, when the electric device is slid and moved to another position while being supplied with power, if the sliding speed is high, the device detection cannot follow the moving speed, and the device detection cannot be detected from time to time.

As a result, there is a problem that power supply to the electric device that is being slid is interrupted, and the electric device operates unintended by the user due to the power supply being interrupted.
The present invention has been made to solve the above-described problem, and an object of the present invention is to provide a non-contact power supply device capable of supplying power without interruption to a power receiving device that moves in a power supply region while receiving power supply. It is providing the detection method and a non-contact electric power feeder.

  A device detection method for a non-contact power supply apparatus for solving the above-described problem is to individually detect and determine whether or not a power receiving device is arranged with respect to primary coils arranged in parallel in a one-dimensional direction or a two-dimensional direction, When it is determined that a power receiving device is disposed in at least one of the primary coils, the determined primary coil is energized with a high frequency current for power supply, and secondary power is supplied to the secondary coil of the power receiving device by electromagnetic induction. In the method for detecting a device of a non-contact power feeding device, the detection determination processing time for each primary coil is shortened after it is determined that the power receiving device is arranged in the primary coil. It has been changed.

  Further, in the above-described configuration, the detection determination processing time to be shortened is an individual detection determination time for the primary coil that is separated from the primary coil that is determined to be detected where the power receiving device is disposed. It is preferable that the time is shorter than the individual detection determination time for the primary coil adjacent to the determined primary coil.

Further, in the above configuration, it is preferable that the detection determination processing time to be shortened is reduced by reducing the individual detection determination accuracy for each primary coil.
A device detection method for a non-contact power supply apparatus for solving the above-described problem is to individually detect and determine whether or not a power receiving device is arranged with respect to primary coils arranged in parallel in a one-dimensional direction or a two-dimensional direction, When it is determined that a power receiving device is disposed in at least one of the primary coils, the determined primary coil is energized with a high frequency current for power supply, and secondary power is supplied to the secondary coil of the power receiving device by electromagnetic induction. An apparatus detection method for a non-contact power feeding device that feeds power to a primary coil adjacent to the primary coil in which the power receiving device is disposed after it is determined that the power receiving device is disposed in a primary coil. The determination is made so that the determination with respect to the primary coil separated from the primary coil in which the power receiving device is arranged is given priority over the determination.

  In the above configuration, after it is determined that the power receiving device is disposed in the primary coil, the power receiving device performs detection and determination on the primary coil adjacent to the primary coil in which the power receiving device is disposed. It is preferable to make a change so as to preferentially perform detection and determination with respect to the primary coil separated from the primary coil.

  In the above configuration, the frequency of detection determination for the primary coil adjacent to the primary coil in which the power receiving device is disposed is the frequency of detection determination of the primary coil separated from the primary coil in which the power receiving device is disposed. It is preferable to increase the amount.

  Further, in the above configuration, after it is determined that the power receiving device is arranged in the primary coil, the power receiving device is arranged after detecting whether the power receiving device is arranged all at once for each primary coil. It is preferable that the determination on the primary coil adjacent to the primary coil is changed so as to be given priority over the determination on the primary coil separated from the primary coil in which the power receiving device is disposed.

  A device detection method for a non-contact power supply apparatus for solving the above-described problem is to individually detect and determine whether or not a power receiving device is arranged with respect to primary coils arranged in parallel in a one-dimensional direction or a two-dimensional direction, When it is determined that a power receiving device is disposed in at least one of the primary coils, the determined primary coil is energized with a high frequency current for power supply, and secondary power is supplied to the secondary coil of the power receiving device by electromagnetic induction. A device detection method for a non-contact power supply apparatus that supplies power to a primary coil adjacent to a primary coil in which the power receiving apparatus is disposed after it is determined that the power receiving apparatus is disposed in a primary coil. The determination with respect to the coil is prioritized over the determination with respect to the primary coil separated from the primary coil in which the power receiving device is disposed, and the detection determination processing time for the primary coil in which the power receiving device is disposed. Characterized by being modified to shorten.

  In the device detection method of the non-contact power supply apparatus for solving the above-described problem, a plurality of primary coils that generate an alternating magnetic field when a high-frequency current for power supply is supplied are arranged in a one-dimensional direction or a two-dimensional direction. When a detection means for detecting a power receiving device is provided for each secondary coil and the determination means determines that a power receiving device is disposed in at least one of the primary coils based on the detection result of the detection means, the determination An apparatus detection method for a non-contact power feeding device in which a high frequency current for power feeding is supplied to a primary coil that is fed and secondary power is fed to a secondary coil of the power receiving device by electromagnetic induction, After detecting the power receiving device with the detecting means corresponding to the coil at the same time, it is determined whether the power receiving device is arranged by the determining means in a predetermined order based on the detection results simultaneously detected by the detecting means. Characterized in that the the cause.

  In the device detection method of the non-contact power supply apparatus for solving the above-described problem, a plurality of primary coils that generate an alternating magnetic field when a high-frequency current for power supply is supplied are arranged in a one-dimensional direction or a two-dimensional direction. When a detection means for detecting a power receiving device is provided for each secondary coil and the determination means determines that a power receiving device is disposed in at least one of the primary coils based on the detection result of the detection means, the determination A method for detecting a device of a non-contact power feeding device in which a high frequency current for power feeding is supplied to a primary coil and a secondary power is fed to a secondary coil of the power receiving device by electromagnetic induction. Are divided into a plurality of sets, and each set is detected in advance in a predetermined order, and the primary coil belonging to the set is simultaneously detected by the corresponding detecting means, and the sets in the predetermined order Detection means belonging to At the same time the detected sensing result, characterized in that the power receiving apparatus by the determination means in the order determined in advance has to be determined whether it is located.

  In the non-contact power feeding apparatus for solving the above-described problem, a plurality of primary coils that generate an alternating magnetic field when a feeding high-frequency current is supplied are arranged in parallel in a one-dimensional direction or a two-dimensional direction. When detecting means for detecting the power receiving device is provided, and the determining means determines that the power receiving device is disposed in at least one of the primary coils based on the detection result of the detecting means, the determined primary A non-contact power feeding device in which a high frequency current for power feeding is supplied to a coil and secondary power is fed to a secondary coil of the power receiving device by electromagnetic induction, wherein the determination unit is connected to the primary coil. Control means for controlling to switch the detection processing mode of each of the detection means to a high-speed detection processing mode after determining that the detection means is arranged is provided.

  Further, in the above configuration, when it is determined that the power receiving device is disposed by the receiving unit that acquires predetermined information from the power receiving device and the determination unit, for the determined primary coil, Temporary power supply control means for energizing the high-frequency current for power supply for a certain period of time, and when the predetermined information from the power receiving device is acquired via the receiving means within the predetermined time, the power supply to the primary coil The power supply control means for continuing energization of the high-frequency current for use, and the control means sets the detection processing mode of each of the detection means at a high speed when the high-frequency current for power supply is energized by the temporary power supply control means. It is preferable to control to switch to the detection processing mode.

  According to the present invention, power can be supplied without interruption to a power receiving device that moves in a power supply region while receiving power.

The whole perspective view for explaining the non-contact electric supply device of an embodiment. Similarly, the front view of the electric power feeder provided in the top plate of the desk. Similarly, the electric block circuit diagram which shows the electric constitution of an electric power feeder and an electric equipment. Similarly, the electric block circuit diagram of the receiving device of an electric equipment. Similarly, the electric block circuit diagram for demonstrating a electric power feeding circuit part. Similarly, the electrical circuit diagram for demonstrating an inverter circuit. Similarly, the electrical block circuit diagram for demonstrating an A / D conversion circuit part. Similarly, (a) is a waveform diagram of the output voltage when the high frequency current for detection is energized, (b) is a waveform diagram of the output voltage when the high frequency current for power supply is energized, and (c) is the output voltage when not energized. Waveform diagram. The electric block circuit diagram for demonstrating the electric power feeding circuit part of another non-contact electric power feeder.

Hereinafter, an embodiment in which the non-contact power feeding device of the present invention is embodied will be described with reference to FIGS.
As shown in FIG. 1, a non-contact power feeding device (hereinafter referred to as a power feeding device) 10 is accommodated in an accommodation recess 3 that is recessed in the left-right direction on the rear side of the top plate 2. Yes. The power feeding device 10 performs non-contact power feeding to an electric device (hereinafter referred to as a device) 20 placed on the top plate 2.

  As shown in FIG. 2, the power supply apparatus 10 has a housing 11. The housing 11 is a rectangular parallelepiped box that is long in the left-right direction, and the upper surface 12 of the housing 11 is formed so as to be flush with the top plate 2 when housed in the housing recess 3 of the top plate 2. ing.

  In the casing 11 that is long in the left-right direction, a plurality (six in this embodiment) of primary coils L1 are installed in a line along the left-right direction. Here, when each of the six primary coils L1 is specified, the first, second, third, fourth, fifth, and last right end from the left to the right are the sixth primary coils. It is called L1.

  Each primary coil L1 installed in a line in the left-right direction in the housing 11 is installed such that its coil surface is opposite to and parallel to the upper surface 12. And the area | region in the upper surface 12 of the housing | casing 11 and the position which opposes each primary coil L1 becomes the electric power feeding surface 13. FIG.

  Each primary coil L1 is connected to a respective power feeding circuit unit 41 (see FIG. 3) provided in the housing 11 for each primary coil L1. Each primary coil L1 radiates a detection alternating magnetic field when a detection high-frequency current having a detection frequency is applied by the corresponding power supply circuit unit 41. In addition, each primary coil L <b> 1 radiates a power supply alternating magnetic field when a power supply high-frequency current having a power supply frequency is supplied by the corresponding power supply circuit unit 41.

  That is, an alternating magnetic field for detection is radiated from the primary coil L1, and it is detected whether or not the device 20 is disposed above the primary coil L1. And if the apparatus 20 is arrange | positioned in the upper position of the primary coil L1, the alternating magnetic field for electric power feeding will be radiated | emitted from the said primary coil L1, and non-contact electric power feeding with respect to the apparatus 20 will be carried out.

  The device 20 is a non-contact power supply light stand in this embodiment, and is provided with a secondary coil L <b> 2 inside the bottom of the base 21. The secondary coil L2 is installed inside the bottom so that the coil surface thereof is parallel to the surface of the top plate 2 (the top surface 12 of the housing 11) when the device 20 is disposed on the top plate 2. Therefore, when the device 20 is disposed on the power feeding surface 13, the coil surface of the secondary coil L <b> 2 faces the coil surface of the primary coil L <b> 1 installed below the power feeding surface 13.

  And when the apparatus 20 is arrange | positioned at the electric power feeding surface 13 of the housing | casing 11, the secondary coil L2 installed in the apparatus 20 is by the alternating magnetic field for electric power feeding which the primary coil L1 radiates | emits based on the high frequency electric current for electric power feeding. An induced electromotive force (secondary power) based on electromagnetic induction is generated. And the secondary coil L2 drives the load (in this case, LED light emitting element etc.) Z of the apparatus 20 based on the secondary electric power.

Next, the electrical configuration of the power supply apparatus 10 and the device 20 will be described with reference to FIG.
(Equipment 20)
First, the device 20 will be described. In FIG. 3, the device 20 includes a power receiving circuit 25 as a power receiving device that receives secondary power from the power feeding device 10 and a load Z.

As shown in FIG. 4, the power receiving circuit 25 includes a rectifier circuit 26, a power receiving side control circuit 27, and a communication circuit 28.
The rectifier circuit 26 is connected to a series circuit of a secondary coil L2 and a secondary side resonance capacitor C2 constituting a secondary circuit on the device 20 side. The secondary coil L2 generates secondary power based on the alternating magnetic field radiated from the primary coil L1, and outputs the secondary power to the rectifier circuit 26.

  The rectifier circuit 26 converts the secondary power generated in the secondary coil L2 by electromagnetic induction by excitation of the primary coil L1 into a DC voltage. The rectifier circuit 26 supplies the converted DC voltage to the load Z of the device 20.

  The DC voltage converted by the rectifier circuit 26 is also used as a drive source for the power receiving side control circuit 27 and the communication circuit 28. The power reception side control circuit 27 is formed of a microcomputer, and outputs a device authentication signal ID and a power supply request signal RQ to the communication circuit 28 when a DC voltage is input from the rectifier circuit 26. The device authentication signal ID is an authentication signal indicating that the power supply device 10 can receive power from the power supply device 10. The power supply request signal RQ is a request signal for requesting the power supply apparatus 10 to supply power.

  Note that the power receiving side control circuit 27 does not output the device authentication signal ID and the power supply request signal RQ to the communication circuit 28 when, for example, the power switch for driving the load Z provided in the device 20 is off. Good. Further, the power receiving side control circuit 27 may not output the device authentication signal ID and the power supply request signal RQ when it is determined that the power receiving side control circuit 27 determines that the power supply should be stopped. For example, when the device 20 is a notebook computer, the device authentication signal ID and the power supply request signal RQ may not be generated when the power supply state continues and the notebook computer side performs an operation that does not consume power. Good.

  The communication circuit 28 is a circuit that transmits the device authentication signal ID and the power supply request signal RQ output from the power receiving side control circuit 27 to the power supply apparatus 10 via the secondary coil L2. The device authentication signal ID and the power supply request signal RQ transmitted to the power supply apparatus 10 are binarized (high level / low level) signals composed of a plurality of bits, and the binarized signals are converted into secondary resonances. It outputs to the receiving wire which connects the capacitor | condenser C2 and the rectifier circuit 26. FIG.

  When a binarized signal is output to the receiving wire, the amplitude of the secondary current flowing in the secondary coil L2 by the electromagnetic induction by energization of the primary coil L1 driven and excited at the power feeding frequency is binary. Changes corresponding to the converted signal.

  The magnetic field radiated from the secondary coil L2 is changed by the change in the amplitude of the secondary current at the power feeding frequency, and the changed magnetic field propagates to the primary coil L1 as electromagnetic induction and flows through the primary coil L1. Change the amplitude of.

  That is, the secondary current of the power supply frequency flowing between both terminals of the secondary coil L2 is amplitude-modulated by the binarized signal (device authentication signal ID and power supply request signal RQ). Then, the magnetic flux of the secondary current of the power supply frequency subjected to amplitude modulation is propagated to the primary coil L1 as a transmission signal.

(Power supply device 10)
Next, the power feeding device 10 will be described. As illustrated in FIG. 3, the power supply apparatus 10 includes a power supply unit unit 40 including a common unit unit 30 and a power supply circuit unit 41 provided for each of the six primary coils L1.

(Common unit 30)
The common unit section 30 includes a power supply circuit 31, a system control section 32 that controls the power supply unit section 40, and a memory 33 that stores various data.

(Power supply circuit 31)
The power supply circuit 31 includes a rectifier circuit and a DC / DC converter, and receives a commercial power supply from the outside and rectifies the rectifier circuit. The power supply circuit 31 converts the rectified DC voltage into a desired voltage by a DC / DC converter, and then outputs the DC voltage Vdd to the system control unit 32, the memory 33, and the power supply unit unit 40 as a drive power supply.

(System control unit 32)
The system control unit 32 includes a microcomputer and controls the power supply unit unit 40. That is, the system control unit 32 controls the power supply circuit unit 41 provided for each of the six primary coils L1 in accordance with a control program of the microcomputer.

The system control unit 32 has a device detection mode and a power supply mode that are executed for each power supply circuit unit 41.
(Device detection mode)
The device detection mode is a mode in which the system control unit 32 detects whether the device 20 (secondary coil L2 of the power receiving device) is disposed on the primary coil L1 of each power feeding circuit unit 41. There are two modes: a mode and a second detection mode.

(First detection mode)
The first detection mode is a mode that is executed when the devices 20 are not arranged on all the primary coils L1. The first detection mode is a mode in which the device 20 is detected by energizing the detection high-frequency current individually for the same time in a predetermined fixed order for all the primary coils L1. Here, the predetermined fixed order in FIG. 2 is the second primary coil L1 to the right from the first primary coil L1 at the left end, the second, third, fourth, fifth, and sixth primary coil L1 at the right end. Move on. When the sixth primary coil L1 ends, the order returns to the first primary coil L1 and is repeated.

  That is, in the first detection mode, when each primary coil L1 (feeding circuit unit 41) is individually detected using the same time at a fixed period and detection of all the primary coils L1 is completed, again, Repeat the same detection operation.

  And the system control part 32 inputs the detection result in each primary coil L1 acquired in 1st detection mode, and determines whether the apparatus 20 is arrange | positioned in the detected order. When the device 20 is arranged in at least one of the six primary coils, the system control unit 32 shifts to the second detection mode and controls each power feeding circuit unit 41 according to the second detection mode. The power supply mode is executed for the arranged primary coil L1.

(Second detection mode)
Unlike the first detection mode described above, the second detection mode is performed by changing the order in which each primary coil L1 is detected according to the primary coil L1 in which the device 20 is arranged. That is, the system control unit 32 identifies which primary coil L1 is adjacent to the primary coil L1 in which the device 20 is arranged by determination. In the second detection mode, the primary coil L1 specified to be adjacent to the primary coil L1 in which the device 20 is disposed is preferentially detected.

  For example, if the device 20 is arranged in the third primary coil L1 shown in FIG. 2, the primary coil L1 adjacent to the third primary coil L1 is the second primary coil L1 located on the left side. This is the fourth primary coil L1 located on the right side. The primary coils L1 separated from the third primary coil L1 are the first, fifth, and sixth primary coils L1. The sixth primary coil L1 is the primary coil L1 farthest from the third primary coil L1.

  In this case, if it is determined that the device 20 is arranged in the third primary coil L1, detection is performed for the second primary coil L1, and then the fourth primary coil L1. That is, the second and fourth primary coils L1 adjacent to the third primary coil L1 are preferentially detected.

  Then, after detecting about the 1st primary coil L1, it returns to the detection of the 3rd primary coil L1 in which the apparatus 20 is arrange | positioned. When the third primary coil L1 is detected, the second primary coil L1 and then the fourth primary coil L1 are detected again. That is, the frequency of detection is increased for the second, third, and fourth primary coils L1.

  Then, after detecting about the 5th primary coil L1, it returns to the detection of the 3rd primary coil L1 in which the apparatus 20 is arrange | positioned. When the third primary coil L1 is detected, the second primary coil L1 and then the fourth primary coil L1 are detected again. That is, the frequency of detection is further increased for the second, third, and fourth primary coils L1.

  Finally, after the detection of the sixth primary coil L1 is performed and the detection of all the primary coils L1 is completed, the process returns to the detection of the third primary coil L1 in which the device 20 is disposed. As long as the arrangement of the devices 20 does not change, detection is repeated in the same order.

  And the system control part 32 inputs the detection result in each primary coil L1 acquired in 2nd detection mode, and determines whether the apparatus 20 is arrange | positioned in the detected order.

  In this way, the system control unit 32 determines whether or not the device 20 arranged on the third primary coil L1 is moved and arranged on the other primary coil L1. For example, when the device 20 is moved and arranged in the adjacent fourth primary coil L1, the system control unit 32 executes the power supply mode for the fourth primary coil L1.

  At this time, the system control unit 32 identifies which primary coil L1 is adjacent to the fourth primary coil L1 (in this case, the third and fifth). Similarly, in the second detection mode, the detection order of each primary coil L1 corresponding to the fourth primary coil L1 in which the device 20 is arranged is changed, and the second detection mode is adjacent to the fourth primary coil L1. The primary coil L1 specified as being detected is preferentially detected.

  In the second detection mode, it is detected whether or not the device 20 is disposed in the primary coil L1 in a state where a high-frequency current for feeding is applied to the primary coil L1 in which the device 20 is disposed. It is carried out. This is because it is necessary to continue power supply without stopping power supply for detection.

  In the second detection mode, the primary coil L1 adjacent to the primary coil L1 in which the device 20 is disposed is not energized with any high-frequency current for detection or power supply, and the primary coil L1 is not energized. It is detected whether or not the device 20 is placed on the device. This is because the alternating magnetic field radiated by the primary coil L1 to which the high-frequency current for feeding is radiated is linked to the adjacent primary coil L1 via the secondary coil L2 being fed. A current flowing through the primary coil L1 is used.

  Furthermore, in the second detection mode, the primary coil L1 that is separated from the primary coil L1 in which the device 20 is disposed is placed in the primary coil L1 in a state where the detection high-frequency current is applied. It is detected whether it was done.

  Therefore, in the second detection mode, the obtained detection results under three different detection conditions are different. As a result, in the system control unit 32, the device 20 is arranged in comparison with different reference values (first to third reference values K1 to K3) corresponding to detection results under three different detection conditions. I am trying to judge whether or not.

  In the second detection mode, the individual detection determination processing times for the first, fifth, and sixth primary coils L1 that are separated from the third primary coil L1 in which the device 20 is disposed are the second, It is shorter than the individual detection determination processing time of the third and fourth primary coils L1.

This is because in the second detection mode, it takes a short time to complete the detection for all the primary coils L1.
(Power supply mode)
The power supply mode is a mode in which the system control unit 32 supplies a power supply high-frequency current to the primary coil L1 with respect to each power supply circuit unit 41, and there are two modes, a temporary power supply knowledge mode and a main power supply mode.

(Temporary power supply mode)
The provisional power supply mode is a mode in which, when it is determined that the device 20 is disposed in the primary coil L1 in the first detection mode, a high-frequency current for power supply is supplied to the primary coil L1 for a certain period of time. The predetermined time for energization is the time required for acquiring the device authentication signal ID and the power supply request signal RQ from the device 20 and determining the contents of the acquired device authentication signal ID and power supply request signal RQ. In other words, the temporary power supply mode is a mode in which drive power required to temporarily drive the power reception side control circuit 27 of the device 20 and output the device authentication signal ID and the power supply request signal RQ is supplied.

The system control unit 32 changes from the first detection mode to the second detection mode when detection detection is made in the first detection mode and the temporary power supply mode is entered.
(Main power supply mode)
In this power supply mode, when the content of the device authentication signal ID and the power supply request signal RQ obtained from the device 20 acquired in the temporary power supply mode is the content of the device 20 that can receive power supply and request power supply, the primary In this mode, energization of the high frequency current for power supply to the coil L1 is continued. That is, when the power supply mode is entered, non-contact power supply to the device 20 is started.

(Memory 33)
The memory 33 is a nonvolatile memory, and stores various data used when the system control unit 32 performs various processing operations. The memory 33 is assigned storage areas for the six primary coils L1, and information on the primary coils L1 at that time is stored in the assigned storage areas. Yes.

(Power supply unit 40)
As shown in FIG. 3, the power supply unit section 40 includes a plurality (six) power supply circuit sections 41 provided for each primary coil L1. Each power supply circuit unit 41 exchanges data with the system control unit 32 and is controlled by the system control unit 32.

Since each power supply circuit unit 41 has the same circuit configuration, one power supply circuit unit 41 will be described with reference to FIG.
(Feeding circuit portion 41)
As shown in FIG. 5, the power feeding circuit unit 41 includes an inverter circuit 42, a drive circuit 43, a current detection circuit 44, a device detection circuit 45, an A / D conversion circuit unit 46, and a signal extraction circuit 47.

(Inverter circuit 42)
As shown in FIG. 6, the inverter circuit 42 is a known half-bridge circuit. The inverter circuit 42 includes a voltage dividing circuit in which a first capacitor Ca and a second capacitor Cb are connected in series, and a series circuit in which a first power transistor Qa and a second power transistor Qb are connected in series to the voltage dividing circuit. Are connected in parallel. In the present embodiment, the first and second power transistors Qa and Qb are configured by N-channel MOSFETs.

  And the primary circuit which comprises the primary circuit by the side of the electric power feeder 10 between the connection point N1 of the 1st capacitor | condenser Ca and the 2nd capacitor | condenser Cb, and the connection point N2 of the 1st power transistor Qa and the 2nd power transistor Qb. A series circuit of the coil L1 and the primary side resonance capacitor C1 is connected.

  As shown in FIG. 6, drive signals PSa and PSb are input from the drive circuit 43 to the gate terminals of the first power transistor Qa and the second power transistor Qb. The first and second power transistors Qa and Qb are alternately turned on and off based on drive signals PSa and PSb respectively input to their gate terminals. As a result, a high-frequency current that energizes the primary coil L1 is generated. And the primary coil L1 radiates | emits an alternating magnetic field by electricity supply of this high frequency current.

(Drive circuit 43)
The drive circuit 43 receives a control signal CT for controlling the frequency of the high-frequency current flowing through the primary coil L1 from the system control unit 32, and outputs the drive signal PSa to the gate terminals of the first and second power transistors Qa and Qb, respectively. , PSb. That is, as shown in FIG. 5, the drive circuit 43 alternately turns on and off the first and second power transistors Qa and Qb based on the control signal CT to set the frequency of the high-frequency current that flows through the primary coil L1. Drive signals PSa and PSb are generated.

  The drive signals PSa and PSb have a dead time so that the first power transistor Qa and the second power transistor Qb are not turned on simultaneously. The second power transistor Qb has the same off time and on time, and the first power transistor Qa has a shorter on time and a correspondingly longer off time.

Here, the control signal CT from the system control unit 32 is a data signal that determines the frequency of the high-frequency current that energizes the primary coil L1.
In the first detection mode, the system control unit 32 outputs a control signal CT for energizing the primary coil L1 with a detection high-frequency current for device detection. Accordingly, in the first detection mode, the drive circuit 43 outputs a control signal CT for detection frequency for device detection from the system control unit 32.

  On the other hand, in the power supply mode, the system control unit 32 outputs a control signal CT for energizing the primary coil L1 with a high frequency current for power supply for power supply. Therefore, in the power supply mode, the drive circuit 43 outputs a power supply frequency control signal CT for power supply from the system control unit 32.

  Incidentally, the system control unit 32 executes the second detection mode when executing the power supply mode for a certain primary coil L1. That is, in the second detection mode, the system control unit 32 outputs to the drive circuit 43 a control signal CT for causing the power supply circuit unit 41 controlled in the power supply mode to continuously generate a high frequency current for power supply. .

  In the second detection mode, the system control unit 32 generates both high-frequency currents for power supply and detection for the power supply circuit unit 41 of the primary coil L1 adjacent to the primary coil L1 that is being supplied with power. The control signal CT not to be output is output to the drive circuit 43.

  Further, in the second detection mode, the system control unit 32 drives the control signal CT that causes the power supply circuit unit 41 of the primary coil L1 that is separated from the primary coil L1 that is being supplied to generate a detection high-frequency current. Output to the circuit 43.

  The power feeding frequency is a resonance frequency determined by an inductance component and a capacitance component on the device 20 side when the device 20 is placed on the power feeding surface 13. On the other hand, the detection frequency is a frequency based on the resonance frequency determined by the inductance component and the capacitance component of the primary circuit on the power supply device 10 side when the device 20 is not placed on the power supply surface 13. Incidentally, the power feeding frequency and the detection frequency are obtained in advance through tests, experiments, calculations, and the like.

(Current detection circuit 44)
The current detection circuit 44 is provided between one terminal of the primary coil L1 and the inverter circuit 42, detects the current primary current flowing through the primary coil L1, and outputs it as a current detection signal SG1. That is, the current detection circuit 44 outputs the current detection signal SG1 when the detection or power feeding high-frequency current is passed through the primary coil L1.

  In addition, when the primary coil L1 is in a state in which neither a high-frequency current for detection nor a power supply is applied, and the adjacent primary coil L1 is supplied with a high-frequency current for supply, the primary coil L1 A primary current flows through the coil L1. This is a current in which the alternating magnetic field of the primary coil L1 that is energized with the feeding high-frequency current flows through the secondary coil L2 that is fed to the non-energized primary coil L1. is there.

  Therefore, when the primary coil L1 is energized with the high frequency current for power supply to the adjacent primary coil L1, the primary coil L1 is not energized with either the high frequency current for detection or power supply. The current detection signal SG1 is output.

(Device detection circuit 45)
The device detection circuit 45 is connected to the current detection circuit 44. The device detection circuit 45 receives the current detection signal SG1 detected by the current detection circuit 44 and converts the current detection signal SG1 into an output voltage Vs relative to the current detection signal SG1. The device detection circuit 45 includes an envelope detection circuit, and detects the current detection signal SG1 of the current detection circuit 44 by the envelope detection circuit. That is, the device detection circuit 45 (envelope detection circuit) generates an envelope waveform signal (output voltage Vs) that wraps the outside of the current detection signal SG1 from the current detection signal SG1 and outputs the envelope waveform signal to the A / D conversion circuit unit 46. To do.

  Incidentally, when the primary coil L1 is intermittently (fixed) with a high frequency current for detection, the output voltage Vs has a waveform as shown by a solid line or a broken line in FIG. The waveform of the output voltage Vs indicated by a solid line in FIG. 8A shows a waveform when the device 20 is not disposed, and the waveform of the output voltage Vs indicated by a broken line in FIG. The waveform when arranged is shown. The fact that the waveform of the output voltage Vs differs depending on the presence or absence of the device 20 has been obtained in advance through experiments, tests, and the like.

  Therefore, it can be seen that the device 20 is arranged in the primary coil L1 when the output voltage Vs is less than the first reference value K1 shown in FIG. The first reference value K1 is obtained in advance through tests, experiments, calculations, and the like.

  Further, when the feeding coil high-frequency current is supplied to the primary coil L1, the output voltage Vs has a waveform as shown by a solid line or a broken line in FIG. The waveform of the output voltage Vs indicated by a solid line in FIG. 8B shows a waveform when the device 20 is not disposed, and the waveform of the output voltage Vs indicated by a broken line in FIG. The waveform when arranged is shown. The fact that the waveform of the output voltage Vs differs depending on the presence or absence of the device 20 has been obtained in advance through experiments, tests, and the like.

  Therefore, when the output voltage Vs is larger than the second reference value K2 shown in FIG. 8B, it can be seen that the device 20 is arranged in the primary coil L1. The second reference value K2 is obtained in advance through tests, experiments, calculations, and the like.

  Further, when the primary coil L1 adjacent to the primary coil L1 to which the high frequency current for power feeding is energized and neither the high frequency current for detection nor power feeding is energized, the output voltage Vs is as shown in FIG. (C) has a waveform as shown by a solid line or a broken line. The waveform of the output voltage Vs indicated by a solid line in FIG. 8C shows a waveform when the device 20 is not disposed, and the waveform of the output voltage Vs indicated by a broken line in FIG. The waveform when arranged is shown. The fact that the waveform of the output voltage Vs differs depending on the presence or absence of the device 20 has been obtained in advance through experiments, tests, and the like.

  Therefore, it can be seen that the device 20 is disposed in the primary coil L1 when the output voltage Vs is larger than the third reference value K3 shown in FIG. The third reference value K3 is obtained in advance through tests, experiments, calculations, and the like.

  The first to third reference values K1 to K3 have the largest second reference value K2, the next largest first reference value K1, and the third smallest reference value K3. Proven in calculations.

(A / D conversion circuit unit 46)
As shown in FIG. 7, the A / D conversion circuit unit 46 includes a low speed A / D conversion unit 51 and a high speed A / D conversion unit 52. One of the low-speed A / D conversion unit 51 and the high-speed A / D conversion unit 52 is selectively controlled by a selection signal SL from the system control unit 32.

  The low speed A / D conversion unit 51 includes a first A / D conversion circuit 51a and a first averaging circuit 51b. The first A / D conversion circuit 51a samples the output voltage Vs from the device detection circuit 45 in time series in response to a plurality of sampling signals SP from the system control unit 32. Then, the first A / D conversion circuit 51a converts a plurality of output voltages Vs at that time of the output voltage Vs sampled in time series into a digital value and outputs the digital value to the first averaging circuit 51b.

  The first averaging circuit 51b is an arithmetic circuit that calculates an average value DS of a plurality of digital values obtained by sampling the output voltage Vs in time series and digitally converting it. The first averaging circuit 51b outputs the obtained average value DS to the system control unit 32.

  On the other hand, the high-speed A / D converter 52 includes a second A / D converter circuit 52a and a second averaging circuit 52b. The second A / D conversion circuit 52a samples the output voltage Vs from the device detection circuit 45 in time series in response to a plurality of sampling signals SP from the system control unit 32. Then, the second A / D conversion circuit 52a converts a plurality of output voltages Vs of the output voltage Vs sampled in time series into digital values and outputs the digital values to the second averaging circuit 52b.

  The second averaging circuit 52b is an arithmetic circuit that obtains an average value DS of a plurality of digital values obtained by sampling the output voltage Vs in time series and digitally converting it. The second averaging circuit 52b outputs the obtained average value DS to the system control unit 32.

  Here, the first A / D conversion circuit 51a and the second A / D conversion circuit 52a have different accuracy. For example, the first A / D conversion circuit 51a converts the output voltage Vs from the device detection circuit 45 into a 16-bit digital value, whereas the second A / D conversion circuit 52a includes a device detection circuit. The output voltage Vs from 45 is converted into an 8-bit digital value.

  That is, the first A / D conversion circuit 51a can perform digital conversion with higher accuracy than the second A / D conversion circuit 52a, but takes time for the conversion process. Conversely, the second A / D conversion circuit 52a is inferior in accuracy to the first A / D conversion circuit 51a, but the conversion processing time is short.

  In addition, the first averaging circuit 51b and the second averaging circuit 52b have different accuracy. For example, the first averaging circuit 51b obtains an average value DS from four sampled digital values, whereas the second averaging circuit 52b obtains an average value DS from two sampled digital values. .

  That is, the first averaging circuit 51b can obtain an average value with higher accuracy than the second averaging circuit 52b, but takes time for the calculation process. On the other hand, the second averaging circuit 52b is less accurate than the first averaging circuit 51b, but the calculation processing time is short.

  Therefore, if the low-speed A / D conversion unit 51 is selectively controlled, the system control unit 32 can acquire the average value DS with high accuracy, but takes time to acquire the average value DS. On the other hand, if the high speed A / D conversion unit 52 is selectively controlled, the system control unit 32 can acquire the average value DS in a short time although the accuracy of the average value DS to be acquired is inferior.

  The system control unit 32 inputs the average value DS from the low-speed A / D conversion unit 51 or the high-speed A / D conversion unit 52 as a detection result, and the primary coil L1 of the power feeding circuit unit 41 based on the average value DS. It is determined whether or not the device 20 (secondary coil L2) is arranged on the top.

  Incidentally, when the high-frequency current for detection is applied to the primary coil L1 and the device 20 is not disposed, the output voltage Vs (average value DS) based on the primary current of the primary coil L1 is As shown by a solid line in FIG. 8A, the value is equal to or greater than a predetermined first reference value K1. On the contrary, when the high frequency current for detection is applied to the primary coil L1 and the device 20 is disposed, the output voltage Vs (average value DS) based on the primary current of the primary coil L1. Is a value less than a predetermined first reference value K1, as indicated by a broken line in FIG.

  When the high-frequency current for feeding is supplied to the primary coil L1 and the device 20 is not disposed, the output voltage Vs (average value DS) based on the primary current of the primary coil L1 is As shown by a solid line in FIG. 8B, the value is equal to or greater than a predetermined second reference value K2. On the contrary, when the power supply high-frequency current is applied to the primary coil L1 and the device 20 is disposed, the output voltage Vs (average value DS) based on the primary current of the primary coil L1. Is a value less than a predetermined second reference value K2, as shown by a broken line in FIG.

Further, in a state where the adjacent primary coil L1 is energized with a high frequency current for power supply, neither the high frequency current for detection nor the power supply for power supply is supplied to the primary coil L1.
In this case, when the device 20 is not arranged, the output voltage Vs (average value DS) based on the primary current of the primary coil L1 is a predetermined first value as shown by a solid line in FIG. 3 The value is less than the reference value K3. On the contrary, when the device 20 is arranged, the output voltage Vs (average value DS) based on the primary current of the primary coil L1 is a predetermined number as shown by a broken line in FIG. It becomes a value of 3 reference value K3 or more.

(Signal extraction circuit 47)
The signal extraction circuit 47 is connected to the current detection circuit 44. The signal extraction circuit 47 inputs the primary current (current detection signal SG1) of the primary coil L1 at that time from the current detection circuit 44 while the primary coil L1 is energized with the feeding high-frequency current. Then, the signal extraction circuit 47 inputs the amplitude-modulated transmission signal transmitted from the secondary coil L <b> 2 of the device 20 placed on the power feeding surface 13 via the current detection circuit 44.

  The signal extraction circuit 47 extracts the device authentication signal ID and the power supply request signal RQ from the input transmission signal. When the signal extraction circuit 47 extracts both the device authentication signal ID and the power supply request signal RQ from the transmission signal, the signal extraction circuit 47 outputs the permission signal EN to the system control unit 32. Then, the system control unit 32 executes the main power supply mode from the temporary power supply mode to the power supply circuit unit 41 of the signal extraction circuit 47 that has output the permission signal EN.

  Incidentally, the signal extraction circuit 47 does not output the permission signal EN to the system control unit 32 when only one of the device authentication signal ID and the power supply request signal RQ is extracted, or when both signals are not extracted. .

Next, the operation of the non-contact power feeding apparatus 10 configured as described above will be described.
(First detection mode)
Now, in a state where the device 20 is not disposed on the power supply surface 13 of the power supply apparatus 10, the system control unit 32 enters the first detection mode and waits for the device 20 to be disposed. At this time, the system control unit 32 outputs a selection signal SL for selecting the low-speed A / D conversion unit 51 to the A / D conversion circuit unit 46 of each power feeding circuit unit 41.

In the first detection mode, the system control unit 32 detects the device 20 by energizing the detection high-frequency current individually for a fixed time in a predetermined fixed order.
Accordingly, when the detection of the arrangement of the device 20 from the first to the sixth primary coil L1 is completed, the detection of repeating the arrangement of the sixth primary coil L1 from the first to the device 20 is performed again. Is called.

  Therefore, the system control unit 32 sequentially outputs a control signal CT for causing each power feeding circuit unit 41 (drive circuit 43) to generate a high-frequency current for detection. Each power feeding circuit unit 41 (inverter circuit 42) energizes the corresponding primary coil L1 with the high frequency current for detection. When each primary coil L1 is sequentially energized with a detection high-frequency current, each device detection circuit 45 outputs an output voltage Vs to the selected low-speed A / D converter 51.

  Each low-speed A / D converter 51 samples four output voltages Vs from the device detection circuit 45 in time series in response to the sampling signal SP from the system controller 32. Each low-speed A / D converter 51 (first A / D converter circuit 51a) converts the four sampled output voltages Vs into 16-bit digital values. Each low-speed A / D converter 51 (first averaging circuit 51b) calculates an average value DS of the four digital values, and outputs the average value DS to the system control unit 32 as a detection result. .

  The system control unit 32 compares and determines the detection result (average value DS) from each power supply circuit unit 41 and the first reference value K1 that are input at a predetermined timing in a predetermined fixed order. I will do it. That is, when the detection result (average value DS) is equal to or greater than the first reference value K1, the system control unit 32 determines that the device 20 is not disposed, and conversely, the detection result (average value DS) is the first reference value. When the value is less than the value K1, it is determined that the device 20 is arranged.

  Therefore, when the device 20 is not disposed in each primary coil L1, the system control unit 32 performs the above control on each power feeding circuit unit 41 until the device 20 is disposed in any one primary coil L1. repeat.

(Second detection mode and power supply mode)
And if the system control part 32 determines with the apparatus 20 having been arrange | positioned at the 3rd primary coil L1, for example, it will perform control for temporary electric power feeding with respect to the electric power feeding circuit part 41 of the 3rd primary coil L1. Do. The system control unit 32 outputs a control signal CT for causing the power supply circuit unit 41 (drive circuit 43) to generate a high frequency current for power supply. The power feeding circuit unit 41 (inverter circuit 42) energizes the corresponding third primary coil L1 with the high frequency current for power feeding.

  Further, the system control unit 32 shifts from the first detection mode to the second detection mode. Here, before executing the second detection mode, the system control unit 32 performs preprocessing for the second detection mode.

  In this preprocessing, the system control unit 32 includes a primary coil L1 adjacent to the third primary coil L1 that performs provisional power supply, a second primary coil L1 located on the left side, and a fourth 1 located on the right side. The next coil L1 is specified. In addition, the system control unit 32 identifies the primary coil L1 that is separated from the third primary coil L1 that performs temporary power supply as the first, fifth, and sixth primary coils L1, and the sixth 1 The secondary coil L1 is identified as the primary coil L1 that is farthest from the third primary coil L1.

  When the identification is completed, the system control unit 32 performs the low-speed A / D conversion unit 51 with respect to the A / D conversion circuit unit 46 of each power feeding circuit unit 41 corresponding to the third, second, and fourth primary coils L1. A selection signal SL for selecting is output. And the system control part 32 outputs the control signal CT which does not produce | generate a high frequency current with respect to the electric power feeding circuit part 41 corresponding to the 2nd and 4th primary coil L1 adjacent to the 3rd primary coil L1, The primary coil L1 is turned off.

  On the other hand, the system control unit 32 selects the high-speed A / D conversion unit 52 for the A / D conversion circuit unit 46 of each power supply circuit unit 41 corresponding to the first, fifth, and sixth primary coils L1. A selection signal SL is output. The system control unit 32 prepares the feeding circuit units 41 corresponding to the first, fifth, and sixth primary coils L1 separated from the third primary coil L1 to generate a high-frequency current for detection. do.

  When the preprocessing is completed, the system control unit 32 starts the detection processing operation in the second detection mode. In the second detection mode, the primary coil L1 specified to be adjacent to the third primary coil L1 in which the device 20 is disposed is preferentially detected.

  First, detection is performed for the second primary coil L1, and then for the fourth primary coil L1. Then, after detecting about the 1st primary coil L1, it returns to the detection of the 3rd primary coil L1 in which the apparatus 20 is arrange | positioned. When the third primary coil L1 is detected, the second primary coil L1 and then the fourth primary coil L1 are detected again.

  Then, after detecting about the 5th primary coil L1, it returns to the detection of the 3rd primary coil L1 in which the apparatus 20 is arrange | positioned. When the third primary coil L1 is detected, the second primary coil L1 and then the fourth primary coil L1 are detected again.

  Finally, when the detection is completed for the sixth primary coil L1, the detection returns to the third primary coil L1 in which the device 20 is arranged, and thereafter, unless the arrangement of the device 20 is changed. The detection is repeated in the same order.

  At this time, whenever the detection in each primary coil L1 is performed from time to time, the system control unit 32 inputs an average value DS as a detection result from the power feeding circuit unit 41 corresponding to each primary coil L1. And the system control part 32 determines whether the apparatus 20 is arrange | positioned using the 1st-3rd reference values K1-K3 according to the detection conditions of each primary coil L1.

That is, the second, third, and fourth primary coils L1 are preferentially detected and determined, and the frequency of detection and determination is increased.
More specifically, a position (primary coil L1) where the device 20 has a high probability of moving within a time in which the detection and determination of all the primary coils L1 are completed, that is, the adjacent primary coil L1 is preferentially detected and The frequency of detection is increased.

  In other words, as in the first detection mode, detection and determination are performed in a predetermined fixed order for detection and determination of all the primary coils L1, whereas in the second detection mode, the device 20 is arranged. The order of detection and determination is changed according to the primary coil L1.

  In addition, as in the first detection mode, when one cycle of detection and determination of all the primary coils L1, each primary coil L1 is detected and determined once, whereas the second detection mode is adjacent. The primary coil L1 to be detected was detected and detected three times. This is because, in the second detection mode, adjacent primary coils L1 having a high probability of moving the device 20 within a time in which the detection and determination of all the primary coils L1 make a round so that the movement of the device 20 can be followed. A number of detections and determinations of the device 20 are performed with priority.

  In other words, when the primary coil L1 is detected in a predetermined fixed order as in the prior art, when the device 20 moves quickly, the detection etc. of all the primary coils L1 is completed and a new one is again made. Until detection or the like is performed, the device 20 cannot receive power at the destination.

  For example, when the device 20 moves from the third to the second primary coil L1, the device 20 (secondary coil L2) is moved from the third primary coil L1 during the movement to the second primary coil L1. Can receive power from. However, when the device 20 faces directly on the second primary coil L1, power cannot be received from the third primary coil L1.

  Moreover, the detection or the like in the second primary coil L1 is not performed until the detection or the like is completed for all the primary coils L1. Therefore, the device 20 (secondary coil L2) cannot receive power from the second primary coil L1 until detection and determination are performed for the second primary coil L1. That is, the power supply is interrupted.

  On the other hand, in the second detection mode, when the device 20 moves from the third to the second primary coil L1, the third primary coil L1 is moved during the movement to the second primary coil L1. Can receive power from the device 20 (secondary coil L2). However, the detection or the like of the adjacent second primary coil L1 is preferentially performed three times until the detection of all the primary coils L1 is completed, and the time interval at which the detection or the like is performed is short.

  Accordingly, detection and determination are performed in which the device 20 is disposed on the second primary coil L1 while the device 20 is moving from the third to the second primary coil L1. As a result, the device 20 (secondary coil L2) can be supplied with power from the second primary coil L1 before it moves to the second primary coil L1 and is placed oppositely.

As a result, in the second detection mode, even when the device 20 moves to the adjacent primary coil L1, power feeding is not interrupted during the movement.
Moreover, in the second detection mode, the A / D conversion circuit unit 46 of the power supply circuit unit 41 of the first, fifth, and sixth primary coils L1 that are separated from the third (power feeding) primary coil L1 is: The high speed A / D converter 52 was selected.

  That is, the position (primary coil L1) where the probability that the device 20 moves within the time required for the detection and determination of all the primary coils L1 is complete, that is, the primary coil L1 that is separated from the primary coil L1 that is being fed. The processing time for detection and determination is reduced. In other words, the time required to complete the detection and determination in all the primary coils L1 is shortened.

  Therefore, it is possible to further shorten the time interval in which the detection or the like of the position (primary coil L1) where the device 20 has a high probability of moving is performed within the time required for the detection and determination of all the primary coils L1. It is possible to prevent interruption of power supply in the middle.

  In addition, when the apparatus 20 is arrange | positioned ranging over the two primary coils L1, the primary coil L1 of the two both sides becomes the adjacent primary coil L1. For example, it is a case where the apparatus 20 (secondary coil L2) is arrange | positioned ranging over the 3rd primary coil L1 and the 4th primary coil L1.

  In this case, the third and fourth primary coils L1 are energized with a feeding high-frequency current. On the other hand, the second and fifth primary coils L1 become adjacent primary coils L1, and the arrangement of the device 20 is detected in a non-energized state. In addition, the first and sixth primary coils L1 become separated primary coils L1, and the detection high-frequency current is applied to perform detection.

  Then, after the detection for the third and fourth primary coils L1, the detection for the second and fifth primary coils L1 is performed, and then the detection for the first primary coil L1 is performed. . Subsequently, after returning to the detection of the third and fourth primary coils L1, the detection of the second and fifth primary coils L1 is performed. Finally, the sixth primary coil L1 is detected and the detection is completed. Thereafter, detection is repeated in the same order as long as the arrangement of the devices 20 does not change.

Next, effects of the embodiment configured as described above will be described below.
(1) According to the above embodiment, when the device 20 is arranged in at least one of the primary coils L1, the order of detection and determination is changed according to the primary coil L1 in which the device 20 is arranged, The adjacent primary coil L1 is preferentially detected and determined.

  Therefore, even when the device 20 moves from the primary coil L1 being fed to the adjacent primary coil L1 at a position where there is a high probability that the device 20 will move, the movement can be detected and determined, and the feeding is not interrupted during the move. .

  (2) According to the above embodiment, when making a round of detection and determination of all the primary coils L1, detection of the primary coil L1 being fed and the primary coil L1 adjacent to the primary coil L1 being fed and Detection was performed three times to increase the detection frequency.

  Therefore, the time interval at which the detection and detection of the adjacent primary coil L1 can be shortened, and even when the device 20 moves to the adjacent primary coil L1, the movement can be detected and determined, Power supply is not interrupted.

  (3) According to the above embodiment, the A / D conversion circuit unit 46 provided in the power supply circuit unit 41 of the separated primary coil L1 located at a low probability that the device 20 moves from the primary coil L1 that is being fed. The high-speed A / D converter 52 was selected. Then, the detection and determination processing time of the separated primary coil L1 located at a position where the probability that the device 20 moves is low is shortened, and the detection and determination of the primary coil L1 located where the device 20 is likely to move is performed. The time interval to be performed was further shortened. That is, the time required for making a round of detection and determination in all the primary coils L1 is shortened.

  Therefore, the time interval in which the adjacent primary coil L1 is detected and detected can be shortened, and even if the device 20 moves to the adjacent primary coil L1, power supply is not interrupted during the movement.

  (4) According to the above-described embodiment, in the second detection mode, for the primary coil L1 that is being fed, whether or not the device 20 is disposed in a state in which a high-frequency current for feeding is supplied to the primary coil L1. Detection and judgment were performed. Therefore, even when the primary coil L1 being fed is detecting whether or not the device 20 is arranged, the feeding is continued and the feeding to the device 20 (secondary coil L2) is not interrupted.

  (5) According to the above-described embodiment, in the second detection mode, the A / D conversion circuit unit 46 is set to the high-speed A / D to shorten the time required for making a round of detection and determination in all the primary coils L1. The D converter 52 was selected. That is, although the accuracy of the average value DS acquired in the second A / D conversion circuit 52a and the second averaging circuit 52b constituting the high-speed A / D conversion unit 52 is inferior, the average value DS is acquired in a short time. I was able to do it.

  This time reduction is performed without applying a load to the system control unit 32. Therefore, the system control unit 32 can use an inexpensive microcomputer without using a microcomputer capable of high-speed processing because the load for reducing the time is reduced.

In addition, you may change the said embodiment as follows.
In the above embodiment, when the second detection mode is set, only the A / D conversion circuit unit 46 of the power feeding circuit unit 41 corresponding to the separated primary coil L1 is set to the low speed A / D conversion unit 51. This may be performed by selecting the A / D conversion circuit units 46 of all the power supply circuit units 41 as the low-speed A / D conversion units 51.

  In the above embodiment, the A / D conversion circuit unit 46 of each power supply circuit unit 41 includes the high-precision low-speed A / D conversion unit 51 and the low-precision high-speed A / D conversion unit 52. For example, the high-speed A / D converter 52 may be omitted, and only the low-speed A / D converter 51 may be used. That is, in the second detection mode, the A / D conversion circuit unit 46 corresponding to the primary coil L1 that is separated from the primary coil L1 that is being fed also uses the low-speed A / D conversion unit 51 to obtain the average value DS. become.

Therefore, the circuit scale can be reduced by the amount that the high-speed A / D converter 52 is omitted, and the power supply apparatus 10 can be made inexpensive.
In the above embodiment, the A / D conversion circuit unit 46 of each power supply circuit unit 41 includes the low speed A / D conversion unit 51 and the high speed A / D conversion unit 52. An A / D conversion circuit unit 46 is provided by providing an A / D conversion circuit capable of changing the accuracy of the digital value (number of bits of the digital value) and an averaging circuit capable of changing the accuracy (the number of samplings) of the average value DS. May be. In this case, the system controller 32 changes and controls the accuracy of the variable A / D conversion circuit and the variable averaging circuit.

  The above embodiment may be implemented by using only one A / D conversion circuit for the A / D conversion circuit unit 46 of each power feeding circuit unit 41. In this case, the digital value of the output voltage Vs sampled by the A / D conversion circuit is output to the system control unit 32 as a detection result.

Thereby, the circuit scale of the power feeding apparatus 10 can be reduced, and the power feeding apparatus 10 can be made inexpensive.
In the above embodiment, the A / D conversion circuit unit 46 is provided in each power supply circuit unit 41. However, this is omitted, and the output voltage Vs of the device detection circuit 45 is directly output to the system control unit 32 as a detection result. May be implemented.

In this case, the circuit scale of the power supply apparatus 10 can be further reduced, and the power supply apparatus 10 can be made inexpensive.
In the above embodiment, each power supply circuit unit 41 is provided with the A / D conversion circuit unit 46. However, as shown in FIG. 9, one A / D conversion circuit unit shared by each power supply circuit unit 41 is used. 46 may be implemented.

  In this case, a selection circuit 55 is newly provided as shown in FIG. Then, the output voltage Vs of the device detection circuit 45 of each power feeding circuit unit 41 is output to the selection circuit 55. The selection circuit 55 sequentially selects the output voltage Vs output from each device detection circuit 45 in the order based on the first and second detection modes by the selection control signal SC from the system control unit 32, and performs A / D conversion. Output to the circuit unit 46.

  The A / D conversion circuit unit 46 samples the output voltage Vs from each device detection circuit 45 sequentially input based on the sampling signal SP from the system control unit 32, converts it to a digital value, and converts the average value DS. Is calculated.

  The A / D conversion circuit unit 46 sequentially outputs the average value DS for each output voltage Vs of each device detection circuit 45 to the system control unit 32 as a detection result. Then, the system control unit 32 compares the sequentially input average value DS with any one of the first to third reference values K1 to K3 and determines.

Therefore, since the power feeding apparatus 10 is configured by one A / D conversion circuit unit 46, the circuit scale can be reduced and the power feeding apparatus 10 can be made inexpensive.
In the above embodiment, in the second detection mode, the order of detection and determination is changed according to the primary coil L1 in which the device 20 is arranged, and the adjacent primary coil L1 is preferentially detected and determined. All (six) primary coils L1 were detected and determined.

  This is not detected and determined for all the primary coils L1 in the second detection mode, but only the primary coil L1 being fed and the adjacent primary coil L1 are detected and determined to be separated 1 You may abbreviate | omit detection and determination about the next coil L1.

  Accordingly, only the primary coil L1 that is being fed and the adjacent primary coil L1 are detected and determined, and the detection and determination of the separated primary coil L1 are omitted, thereby shortening the detection and determination time required for one round. be able to.

  In this case, the system control unit 32 stores each detection result (average value DS) at each time in the memory 33 for the primary coil L1 being fed and the adjacent primary coil L1. Every time a new detection result (average value DS) is input, the system control unit 32 compares the previous detection result (average value DS) and predicts the moving direction of the device 20.

  This prediction is performed by grasping the fluctuation tendency of the average value DS. That is, for the adjacent primary coil L1, as the device 20 approaches, the average value DS (output voltage Vs) moves from the solid line position in FIG. 8C to the broken line position. The system control unit 32 can predict that the device 20 is approaching if it grasps the fluctuation tendency of the average value DS, and assumes that the device 20 is arranged, and can start power feeding in advance.

  In addition, for the primary coil L1 that is being fed, the average value DS (output voltage Vs) moves from the broken line position to the solid line position in FIG. The system control unit 32 can predict the moving direction of the device 20 to the adjacent primary coil L1 by grasping the fluctuation tendency of the average value DS.

  Then, when the movement direction of the device 20 can be predicted, the system control unit 32 sets the primary coil L1 that is separated in the movement direction as a new adjacent primary coil L1 to be detected and determined. At this time, the adjacent primary coil L1 on the opposite side to the moving direction becomes the separated primary coil L1 and is excluded from the detection and determination targets.

  Thus, by predicting the moving direction of the device 20, the number of primary coils L1 to be detected can be reduced, the detection and determination time required for one round can be shortened, and the power supply from the power supply apparatus 10 is not interrupted. .

  In the above embodiment, in the first detection mode and the second detection mode, energization of the detection high-frequency currents of the primary coils L1 is performed at different timings. Alternatively, in the first detection mode, the detection high-frequency currents may be energized simultaneously at the same timing for the primary coils L1.

  In this case, the device detection circuits 45 of the power supply circuit units 41 output the output voltage Vs to the A / D conversion circuit unit 46 at the next stage all at once. The A / D conversion circuit unit 46 of each power supply circuit unit 41 converts each output voltage Vs into a digital value at the same timing to obtain an average value DS. Then, with the A / D conversion circuit unit 46 of each power supply circuit unit 41 obtaining the average value DS, the system control unit 32 inputs each average value DS in the order in the first detection mode and determines in order. To do.

  On the other hand, in the second detection mode, the detection high-frequency currents are energized simultaneously at the same timing for the primary coils L1 that are separated from the primary coil L1 that is being fed. And the apparatus detection circuit 45 of each electric power feeding circuit part 41 corresponding to the separated primary coil L1 outputs to the output voltage Vs based on energization of the detection high-frequency current to the A / D conversion circuit part 46 of the next stage all at once. .

  At the same time, the device detection circuit 45 of the power feeding circuit unit 41 corresponding to the primary coil L1 that is feeding power outputs the output voltage Vs to the A / D conversion circuit unit 46 in the next stage based on the feeding of the power feeding high-frequency current. At the same time, the device detection circuit 45 of the power feeding circuit unit 41 corresponding to the primary coil L1 adjacent to the primary coil L1 that is feeding power supplies the output voltage Vs based on the non-energized state to the A / D conversion circuit unit 46 in the next stage. Output to.

  Thereby, the A / D conversion circuit unit 46 of each power feeding circuit unit 41 converts the input output voltage Vs into a digital value at the same timing, and obtains an average value DS. Then, with the A / D conversion circuit unit 46 of each power supply circuit unit 41 obtaining the respective average values DS, the system control unit 32 inputs the respective average values DS in order in the second detection mode. judge. Note that the order of determination of each average value DS in the second detection mode does not preferentially determine the average value DS of the power feeding circuit unit 41 of the adjacent primary coil L1, and has the same priority as the first detection mode. The determination may be made without setting the order.

  That is, in both the first detection mode and the second detection mode, the detection process until the detection result (average value DS) is obtained is simultaneously performed in the power feeding circuit unit 41 of each primary coil L1. Therefore, it is possible to shorten the time required for the detection and determination of all the primary coils L1 to be completed as compared with the case where each power feeding circuit unit 41 sequentially performs detection processing.

  As a result, since it is possible to shorten the time required to complete the detection and determination of all the primary coils L1, it is possible to detect the movement of the device 20, and the power supply to the device 20 is not interrupted.

  In this case, the A / D conversion circuit unit 46 may be implemented using only one of the low-speed A / D conversion unit 51 and the high-speed A / D conversion unit 52. Further, in the low-speed A / D converter 51 or the high-speed A / D converter 52, the averaging circuit may be omitted and only the A / D converter circuit may be used.

  Further, in the first detection mode and the second detection mode, all six primary coils L1 are not subjected to detection processing at the same timing, but are divided into a plurality of sets, and each set is assigned to the primary coil L1 belonging to the set. Alternatively, detection processing may be performed simultaneously. For example, the group of the first, third, and fifth primary coils L1 is divided into two groups as the first set, and the group of the second, fourth, and sixth primary coils L1 is divided into the second group.

  First, detection processing is performed at the same timing for each primary coil L1 of the first set. Subsequently, the system control unit 32 sequentially inputs and determines the average value DS of the power feeding circuit unit 41 of each primary coil L1 of the first set.

When the first set of detection and determination ends, the second set of primary coils L1 may be detected and determined in the same manner as in the first set.
In this case as well, since the time required to complete the detection and determination of all the primary coils L1 can be shortened, detection capable of following the movement of the device 20 is possible, and power supply to the device 20 is not interrupted.

  In each of the above embodiments, the device detection circuit 45 detects the device 20 (secondary coil L2) based on the current detection signal (primary current) of the current detection circuit 44. For example, a dedicated detection sensor such as a photo sensor or a device detection coil is disposed on the power supply surface 13 of each primary coil L1 on the upper surface 12 of the housing 11 to detect the device 20 to be disposed. You may do it.

In the above embodiment, six primary coils L1 are provided in the left-right direction, but the number is not limited to six. For example, four, five, or seven or more may be provided. .
Furthermore, although the primary coil L1 is arranged in parallel in the one-dimensional direction in the above embodiment, it may be applied to a non-contact power feeding device arranged in parallel in the two-dimensional direction.

In the above embodiment, the power supply device 10 is embodied in the desk 1, but is not limited to this. For example, it may be provided on a floor, wall, bar, sill, pillar, guide rail or the like.
In the above embodiment, the device 20 is moved with respect to the power supply apparatus 10. This may be applied to a non-contact power feeding system in which the device 20 is fixed and the power feeding device 10 is moved with respect to the device 20. Of course, you may apply to the non-contact electric power feeding system comprised so that both the apparatus 20 and the electric power feeder 10 might move.

  In the above embodiment, a backup battery may be built in the power receiving device of the device 20. The battery for backup is supplied to the load Z by supplying power to the battery for backup when the device 20 moves while jumping up the power supply surface 13 and the power supply from the power supply apparatus 10 is interrupted. Can be prevented from being temporarily interrupted. Of course, the backup battery can supply power to the load Z and supply power to the load Z even when the device 20 moves at an unexpected speed and power supply from the power supply device 10 is interrupted due to the movement. Can be temporarily interrupted.

  Note that the backup battery is preferably a secondary battery. Moreover, it is preferable that the power receiving circuit 25 be configured to charge the backup battery together when the power receiving circuit 25 receives power from the power supply apparatus 10.

In the above embodiment, the inverter circuit 42 is implemented by a half bridge circuit, but may be implemented by other high frequency oscillation circuits such as a full bridge circuit.
Next, a technical idea that can be grasped from the above embodiment and another example will be added below.

(Appendix 1)
A plurality of primary coils that generate an alternating magnetic field when energized with a high-frequency current for power supply are arranged in a one-dimensional direction or a two-dimensional direction, and a detection unit that detects a power receiving device for each primary coil is provided, and the detection unit When the determination means determines that a power receiving device is arranged in at least one of the primary coils based on the detection result of the current, a high-frequency current for power feeding is supplied to the determined primary coil by electromagnetic induction. A non-contact power feeding device configured to feed secondary power to a secondary coil of the power receiving device, wherein the detection unit detects after the determination unit determines that the power receiving device is disposed in the primary coil. A non-contact power feeding apparatus comprising a control means for controlling to switch a processing mode to a high-speed detection processing mode.

(Appendix 2)
In the non-contact power feeding device according to attachment 1, when the receiving unit that acquires predetermined information from the power receiving device and the determining unit determines that the power receiving device is disposed, the determined primary A temporary power supply control means for supplying the power supply high-frequency current to the coil for a predetermined time; and when the predetermined information is acquired from the power receiving device via the receiving means within the predetermined time, the primary The power supply control means for continuing the supply of the power supply high-frequency current to the coil, and the control means when each of the detection means is supplied when the power supply high-frequency current is supplied by the temporary power supply control means. Control to switch the detection processing mode to the high-speed detection processing mode.

(Appendix 3)
In the non-contact power feeding device according to appendix 1 or 2, the detection unit digitally outputs a detection signal output unit that outputs a detection signal relative to an arrangement mode of the power reception device, and a detection signal from the detection signal output unit. A / D conversion means for converting the value into a value, wherein the determination means inputs a digital value output from the A / D conversion means as the detection result, and the control means uses the determination means to perform primary processing. After it is determined that the power receiving device is disposed in the coil, the A / D conversion unit is controlled to the high-speed A / D conversion processing mode.

(Appendix 4)
The contactless power supply device according to attachment 3, wherein the A / D conversion unit samples a plurality of detection signals from the detection signal output unit in time series, and converts the sampled detection signals into digital values. And an A / D conversion circuit that calculates an average value of a plurality of digital values converted by the A / D conversion circuit, and outputs the average value to the determination means as the detection result, The A / D conversion circuit controls the resolution or the number of samplings by the control unit, and outputs the detection result output from the averaging circuit to the determination unit in a short time.

(Appendix 5)
In the non-contact power feeding device according to attachment 3, the A / D conversion means samples a plurality of detection signals from the detection signal output means in time series, and converts the sampled detection signals into digital values. The first A / D conversion circuit and the first A / D conversion circuit have a higher conversion processing speed, and a plurality of detection signals from the detection signal output means are sampled in time series. A second A / D conversion circuit for converting the detection signal into a digital value, an average value of a plurality of digital values converted by the first A / D conversion circuit, and obtaining the average value as the detection result As an average value of a plurality of digital values converted by the first averaging circuit and the second A / D conversion circuit that are output to the determination means, the average value is used as the detection result as the determination means. Output to A second averaging circuit, and the control means sets the second A / D conversion circuit and the second averaging circuit when the A / D conversion means is set to a high-speed A / D conversion processing mode. Select.

(Appendix 6)
In the non-contact power feeding device according to any one of appendices 3 to 5, a detection high-frequency current generation circuit that generates a high-frequency current having a detection frequency and energizes the primary coil is provided, and the detection signal output unit includes: The voltage detection circuit unit outputs to the determination unit as a detection signal relative to the primary current flowing through the primary coil, and the determination unit is not energized by the high-frequency current for power supply. Or when it is not adjacent to the primary coil that is energized by the power supply high-frequency current, the detection high-frequency current generated by the detection high-frequency current generation circuit is energized to the primary coil, The detection result based on the detection signal detected by the voltage detection circuit unit based on energization is determined by comparison with a predetermined first reference value, and the primary coil is used for the power supply high-frequency current. The detection result based on the detection signal detected by the voltage detection circuit unit based on the energization is determined by comparing with a predetermined second reference value, the primary coil, The detection based on the detection signal detected by the voltage detection circuit unit in a non-energized state when the primary coil is adjacent to a primary coil energized with a high-frequency current for power supply. The result is determined by comparing with a predetermined third reference value.

(Appendix 7)
In the non-contact power feeding device according to any one of appendices 1 to 6, the power receiving device includes a backup battery.

(Appendix 8)
A plurality of primary coils that generate an alternating magnetic field when energized with a high-frequency current for power supply are arranged in a one-dimensional direction or a two-dimensional direction, and a detection unit that detects a power receiving device for each primary coil is provided, and the detection unit When the determination means determines that a power receiving device is arranged in at least one of the primary coils based on the detection result of the current, a high-frequency current for power feeding is supplied to the determined primary coil by electromagnetic induction. A non-contact power feeding device configured to feed secondary power to a secondary coil of the power receiving device, wherein the power receiving device is disposed after the determination unit determines that the power receiving device is disposed in the primary coil. The determination means based on the detection result of the detection means for the adjacent primary coil specified by the specifying means and the specifying means for specifying the primary coil adjacent to the primary coil is prioritized. Non-contact power feeding apparatus characterized by having a control means for causing.

(Appendix 9)
The contactless power supply device according to appendix 8, wherein the control unit determines the frequency of detection determination for the primary coil adjacent to the primary coil in which the power receiving device specified by the specifying unit is arranged. Each of the detection means and the determination means are controlled so as to be more frequent than the frequency of detection determination of the primary coil that is separated from the primary coils arranged opposite to each other.

(Appendix 10)
In the non-contact power feeding device according to appendix 8 or 9, when the receiving unit that acquires predetermined information from the power receiving device and the determining unit determine that the power receiving device is disposed opposite to the power receiving device, the determination is made. When the temporary power supply control means for supplying the high-frequency current for power supply to the primary coil for a certain time and the predetermined information from the power receiving device are acquired via the receiving means within the certain time, The power supply control means for continuing the supply of the high-frequency current for power supply to the primary coil, and the specifying means is arranged adjacent to the adjacent power supply when the high-frequency current for power supply is supplied by the temporary power supply control means. The primary coil thus identified is identified.

(Appendix 11)
The contactless power supply device according to any one of appendices 8 to 10, wherein the detection unit includes a detection signal output unit that outputs a detection signal relative to an arrangement mode of the power reception device, and the detection signal output unit. And an A / D conversion circuit that converts the detection signal into a digital value, and the determination unit inputs a digital value output from the A / D conversion circuit as the detection result.

(Appendix 12)
The contactless power supply device according to attachment 11, wherein an averaging circuit is provided between the A / D conversion circuit and the determination unit, and a plurality of the detection signals are sampled in time series, and the plurality of sampled detections are sampled. After the signal is converted into a digital value by the A / D conversion circuit, an average value of the plurality of converted digital values is obtained by the averaging circuit, and the average value is output to the determination means as the detection result. .

(Appendix 13)
The contactless power supply device according to appendix 11 or 12, wherein a detection high-frequency current generation circuit that generates a high-frequency current having a detection frequency and energizes the primary coil is provided, and the detection signal output means is provided in the primary coil. A voltage detection circuit unit that outputs a detection signal relative to the flowing primary current as the detection result to the determination unit; and the determination unit is configured such that the primary coil is not energized by the high-frequency current for power supply. Or when not adjacent to the primary coil that is energized by the power supply high-frequency current, the detection high-frequency current generated by the detection high-frequency current generation circuit is energized to the primary coil, The detection result based on the detection signal detected by the voltage detection circuit unit is determined by comparing with a predetermined first reference value, and the primary coil is The primary coil is energized with a wave current and the detection result based on the detection signal detected by the voltage detection circuit unit based on the energization is determined by comparison with a predetermined second reference value. Is adjacent to the primary coil that is energized with the high-frequency current for power supply, the primary coil is placed in a non-energized state, and the detection signal detected by the voltage detection circuit unit in the non-energized state The detection result based is determined by comparing with a predetermined third reference value.

(Appendix 14)
In the non-contact power feeding device according to any one of appendices 8 to 13, the power receiving device includes a backup battery.

(Appendix 15)
A plurality of primary coils that generate an alternating magnetic field when energized with a high-frequency current for power supply are arranged in a one-dimensional direction or a two-dimensional direction, and a detection unit that detects a power receiving device for each primary coil is provided, and the detection unit When the determination means determines that a power receiving device is arranged in at least one of the primary coils based on the detection result of the current, a high-frequency current for power feeding is supplied to the determined primary coil by electromagnetic induction. A non-contact power feeding device configured to feed secondary power to the secondary coil of the power receiving device, wherein the detection operation of each of the detection means is performed simultaneously, and the detection result of each of the detection means is A non-contact power feeding apparatus comprising a control unit that performs determination by the determination unit in a predetermined order.

(Appendix 16)
The contactless power supply device according to appendix 15, wherein after the determination unit determines that the power receiving device is disposed in the primary coil, the identification that identifies the primary coil adjacent to the primary coil in which the power receiving device is disposed The control means preferentially performs the determination of the determination means based on the detection result of the detection means for the adjacent primary coil specified by the specification means.

(Appendix 17)
The contactless power supply device according to appendix 15 or 16, wherein the detection unit digitally outputs a detection signal output unit that outputs a detection signal relative to an arrangement mode of the power reception device, and a detection signal from the detection signal output unit. An A / D conversion circuit for converting the value into a value, and the determination unit inputs a digital value output from the A / D conversion circuit as the detection result.

(Appendix 18)
The contactless power feeding device according to appendix 17, wherein an averaging circuit is provided between the A / D conversion circuit and the determination unit, and a plurality of the detection signals are sampled in time series, and the plurality of sampled detections are sampled. After the signal is converted into a digital value by the A / D conversion circuit, an average value of the plurality of converted digital values is obtained by the averaging circuit, and the average value is output to the determination means as the detection result. .

(Appendix 19)
The contactless power supply device according to appendix 17 or 18, wherein a detection high-frequency current generation circuit that generates a high-frequency current having a detection frequency and energizes the primary coil is provided, and the detection signal output means is provided in the primary coil. A voltage detection circuit unit that outputs a detection signal relative to the flowing primary current as the detection result to the determination unit; and the determination unit is configured such that the primary coil is not energized by the high-frequency current for power supply. Or when not adjacent to the primary coil that is energized by the power supply high-frequency current, the detection high-frequency current generated by the detection high-frequency current generation circuit is energized to the primary coil, The detection result based on the detection signal detected by the voltage detection circuit unit is determined by comparing with a predetermined first reference value, and the primary coil is The primary coil is energized with a wave current and the detection result based on the detection signal detected by the voltage detection circuit unit based on the energization is determined by comparison with a predetermined second reference value. Is adjacent to the primary coil that is energized with the high-frequency current for power supply, the primary coil is placed in a non-energized state, and the detection signal detected by the voltage detection circuit unit in the non-energized state The detection result based is determined by comparing with a predetermined third reference value.

(Appendix 20)
The contactless power feeding device according to any one of appendices 15 to 29, wherein the power receiving device includes a backup battery.

(Appendix 21)
A plurality of primary coils that generate an alternating magnetic field when energized with a high-frequency current for power supply are arranged in a one-dimensional direction or a two-dimensional direction, and a detection unit that detects a power receiving device for each primary coil is provided, and the detection unit When the determination means determines that a power receiving device is arranged in at least one of the primary coils based on the detection result of the current, a high-frequency current for power feeding is supplied to the determined primary coil by electromagnetic induction. A non-contact power feeding device configured to feed secondary power to a secondary coil of the power receiving device, wherein each primary coil is divided into a plurality of sets, and each set belongs to the set in a predetermined order. The detection unit that simultaneously detects the primary coil detects the power receiving device, and the detection unit detects a detection result that is simultaneously detected by each detection unit belonging to the set in a predetermined order. Judgment by Non-contact power feeding apparatus characterized in that a control means for.

(Appendix 22)
In the non-contact power feeding device according to attachment 21, the detection unit outputs a detection signal output unit that outputs a detection signal relative to an arrangement mode of the power receiving device, and a detection signal from the detection signal output unit is converted into a digital value. An A / D conversion circuit for conversion, and the determination means inputs a digital value output from the A / D conversion circuit as the detection result.

(Appendix 23)
The contactless power supply device according to attachment 22, wherein an averaging circuit is provided between the A / D conversion circuit and the determination unit, and a plurality of the detection signals are sampled in time series, and the plurality of sampled detections are sampled. After the signal is converted into a digital value by the A / D conversion circuit, an average value of the plurality of converted digital values is obtained by the averaging circuit, and the average value is output to the determination means as the detection result. .

(Appendix 24)
The contactless power feeding device according to attachment 22 or 23, wherein a detection high-frequency current generation circuit that generates a high-frequency current having a detection frequency and energizes the primary coil is provided, and the detection signal output means is provided in the primary coil. A voltage detection circuit unit that outputs a detection signal relative to the flowing primary current as the detection result to the determination unit; and the determination unit is configured such that the primary coil is not energized by the high-frequency current for power supply. Or when not adjacent to the primary coil that is energized by the power supply high-frequency current, the detection high-frequency current generated by the detection high-frequency current generation circuit is energized to the primary coil, The detection result based on the detection signal detected by the voltage detection circuit unit is determined by comparing with a predetermined first reference value, and the primary coil is The primary coil is energized with a wave current and the detection result based on the detection signal detected by the voltage detection circuit unit based on the energization is determined by comparison with a predetermined second reference value. Is adjacent to the primary coil that is energized with the high-frequency current for power supply, the primary coil is placed in a non-energized state, and the detection signal detected by the voltage detection circuit unit in the non-energized state The detection result based is determined by comparing with a predetermined third reference value.

(Appendix 25)
In the non-contact power feeding device according to any one of appendices 21 to 24, the power receiving device includes a backup battery.

  DESCRIPTION OF SYMBOLS 1 ... Desk, 2 ... Top plate, 3 ... Housing recessed part, 10 ... Non-contact electric power feeder (electric power feeder), 11 ... Housing | casing, 12 ... Upper surface, 13 ... Electric power feeding surface, 20 ... Electric equipment (equipment), 21 ... Base 25, power receiving circuit, 26 ... rectifier circuit, 27 ... power receiving side control circuit, 28 ... communication circuit, 30 ... common unit section, 31 ... power supply circuit, 32 ... system control section (control means, determination means, specifying means, Temporary power supply control means, power supply control means) 33 ... Memory 40 ... Power supply unit section 41 ... Power supply circuit section 42 ... Inverter circuit (detection high-frequency current generation circuit) 43 ... Drive circuit 44 ... Current detection circuit ( Detection means, detection signal output means), 45 ... device detection circuit (detection means, voltage detection circuit section), 46 ... A / D conversion circuit section, 47 ... signal extraction circuit (reception means), 51 ... low speed A / D conversion Part, 51a ... 1st A / D conversion circuit, 5 b: first averaging circuit, 52: high-speed A / D conversion unit, 52a: second A / D conversion circuit, 52b: second averaging circuit, 55: selection circuit, L1: primary coil, L2 ... secondary coil, Z ... load, C1, C2 ... primary and secondary resonance capacitors, Ca, Cb ... first and second capacitors, Qa, Qb ... first and second power transistors, N1, N2 ... Connection point, PSa, PSb ... drive signal, SG1 ... current detection signal, SL ... selection signal, Vs ... output voltage (detection result), K1 to K3 ... first to third reference values, DS ... average value, SP ... sampling Signal, ID ... device authentication signal, RQ ... power supply request signal, EN ... permission signal, SC ... selection control signal.

Claims (10)

Whether or not a power receiving device is arranged for a plurality of primary coils arranged side by side in a one-dimensional direction or two-dimensional direction is individually detected and determined, and it is determined that a power receiving device is arranged in at least one of the primary coils. A non-contact power supply device detection method in which a high frequency current for power supply is supplied to the determined primary coil and secondary power is supplied to the secondary coil of the power receiving device by electromagnetic induction. ,
After it is determined that the power receiving device is disposed in the primary coil, the power receiving device is disposed as a detection determination method related to the primary coil that is separated from the primary coil that is detected and determined to be disposed of the power receiving device. Using a detection determination method that is different from the detection determination method for the primary coil adjacent to the primary coil that has been detected and detected, individual detection for the primary coil that is separated from the primary coil that has been detected and determined that the power receiving device is disposed A device detection method for a non-contact power feeding apparatus , wherein the determination time is shortened and the time required for the detection determination process for each primary coil to complete is shortened. In the apparatus detection method of the non-contact electric power feeder according to claim 1,
Time detection determining process to shorten the takes a round, the individual detection determination time to the primary coil spaced from the power receiving device is placed and sensed the determined primary coil, the power receiving device is determined disposed detected A device detection method for a non-contact power feeding device, characterized in that the device detection time is shorter than an individual detection determination time for a primary coil adjacent to the primary coil. In the apparatus detection method of the non-contact power feeding device according to claim 1 or 2,
Time detection determining process to shorten the takes a round is, non-contact, characterized in that shortening the separate detection determination time by lowering the individual detection identification precision of the primary coil spaced from the detection determination by said primary coil Device detection method for power feeding device. Whether or not a power receiving device is arranged for a plurality of primary coils arranged side by side in a one-dimensional direction or two-dimensional direction is individually detected and determined, and it is determined that a power receiving device is arranged in at least one of the primary coils. A non-contact power supply device detection method in which a high frequency current for power supply is supplied to the determined primary coil and secondary power is supplied to the secondary coil of the power receiving device by electromagnetic induction. ,
After it is determined that the power receiving device is disposed in the primary coil, the determination on the primary coil adjacent to the primary coil in which the power receiving device is disposed is separated from the primary coil in which the power receiving device is disposed. A device detection method for a non-contact power feeding device, wherein the method is changed so as to be performed with priority over the determination for the next coil. In the non-contact electric power feeder apparatus detection method of Claim 4,
After it is determined that the power receiving device is disposed in the primary coil, detection and determination for the primary coil adjacent to the primary coil in which the power receiving device is disposed are detected from the primary coil in which the power receiving device is disposed. A device detection method for a non-contact power feeding device, wherein the device detection method is changed so as to be performed with priority over detection and determination for a separated primary coil. In the apparatus detection method of the non-contact electric power feeder according to claim 4 or 5,
The frequency of detection determination for the primary coil adjacent to the primary coil in which the power receiving device is disposed is greater than the frequency of detection determination of the primary coil separated from the primary coil in which the power receiving device is disposed. A device detection method for a non-contact power supply device. In the non-contact electric power feeder apparatus detection method of Claim 4,
After determining that the power receiving device is arranged in the primary coil, after detecting whether the power receiving device is arranged all at once for each primary coil, adjacent to the primary coil in which the power receiving device is arranged A device detection method for a non-contact power feeding device, wherein the determination for the primary coil is changed so as to be performed in preference to the determination for the primary coil separated from the primary coil in which the power receiving device is disposed. Whether or not a power receiving device is arranged for a plurality of primary coils arranged side by side in a one-dimensional direction or two-dimensional direction is individually detected and determined, and it is determined that a power receiving device is arranged in at least one of the primary coils. A non-contact power supply device detection method in which a high frequency current for power supply is supplied to the determined primary coil and secondary power is supplied to the secondary coil of the power receiving device by electromagnetic induction. ,
After determining that the power receiving device is disposed in the primary coil, the determination on the primary coil adjacent to the primary coil in which the power receiving device is disposed is separated from the primary coil in which the power receiving device is disposed. A device for a non-contact power feeding device, which is performed in preference to the determination for the primary coil, and is changed so as to shorten the time interval in which the detection and determination for the primary coil in which the power receiving device is arranged is performed. Detection method. A plurality of primary coils that generate an alternating magnetic field when energized with a high-frequency current for power supply are arranged in a one-dimensional direction or a two-dimensional direction, and a detection unit that detects a power receiving device for each primary coil is provided, and the detection unit When the determination means determines that a power receiving device is arranged in at least one of the primary coils based on the detection result of the current, a high-frequency current for power feeding is supplied to the determined primary coil by electromagnetic induction. A non-contact power feeding device configured to feed secondary power to a secondary coil of the power receiving device,
Control for controlling the detection processing mode of the detection means of the primary coil separated from the primary coil determined to be detected to the high-speed detection processing mode after the determination unit determines that the power receiving device is arranged in the primary coil. A non-contact power feeding device characterized in that means is provided. The contactless power supply device according to claim 9 , wherein
Receiving means for acquiring predetermined information from the power receiving device;
Temporary power supply control means for supplying the high-frequency current for power supply to the determined primary coil for a certain period of time when it is determined by the determination means that the power receiving device is disposed;
The power supply control means for continuing energization of the high-frequency current for power supply to the primary coil when the predetermined information from the power receiving device is acquired via the receiving means within the predetermined time,
The control means sets the detection processing mode of the detection means of the primary coil separated from the primary coil detected and determined when the high-frequency current for power supply is energized by the temporary power supply control means to the high-speed detection processing mode. The non-contact electric power feeder characterized by controlling to switch to.